Help required to amplify output

Discussion in 'The Projects Forum' started by skg1106, Feb 13, 2012.

  1. skg1106

    Thread Starter New Member

    Feb 13, 2012
    4
    0
    Hello,
    I need to amplify a digital output to switch a SSR.
    The SSR has a input of 3-32v dc.
    My output is a signal from a dr daq data logger 3.3vdc 1ma.
    Can anyone give advice on best method of achieving this?

    Much Appreciated.
     
  2. mcasale

    Member

    Jul 18, 2011
    210
    12
    Can you give us the part number of the SSR?

    What is the load current through the SSR?
     
  3. skg1106

    Thread Starter New Member

    Feb 13, 2012
    4
    0

    The SSR is a Fotek 10 DA-H
    input 3-32vdc 4-20ma
    output 90-480 vac

    i am using the ssr to operate a solinoid 220vac 3.5va
     
  4. mcasale

    Member

    Jul 18, 2011
    210
    12
    Your load (3.5va = 16mA) is pretty small. Why do you want to use a SSR?

    Do you require the optical isolation for safety? Maybe the zero-cross capability?

    Anyway, the control input already looks TTL compatible. They do not specify the input current at 5V, so it may be prudent to buffer the input with a 7407 open-collector buffer with a pull-up resistor.


    Input Data             Operating Voltage 3~32VDC Min. ON / OFF Voltage ON > 2.4V , OFF < 1.0V Trigger Current 7.5mA / 12V Control Method Zero Cross Trigger
     
  5. skg1106

    Thread Starter New Member

    Feb 13, 2012
    4
    0
    The reason for the ssr is for safety the soilnoid being operated is 220vac.
    I do not have any experience with electronics could you do a quick schematic.
     
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